Published: March 4, 2013

PHOTOS: Vice President Joseph R. Biden Jr. and Representative John Lewis of Georgia led more than 5,000 people over the Edmund Pettus Bridge in Selma, Ala., to commemorate the 48th anniversary of Bloody Sunday. On March 7, 1965, state troopers attacked marchers promoting equal voting rights, and more than 50 people were injured, including Mr. Lewis. When the march was remounted later that month, it was led by the Rev. Dr. Martin Luther King Jr., left, and was 25,000 strong. Congress passed the Voting Rights Act that summer. Now, the Supreme Court will issue a ruling on a challenge to the act, having heard oral arguments in the case on Wednesday. (PHOTOGRAPHS BY DAVE ARTIN/ASSOCIATED PRESS; ASSOCIATED PRESS)